/*
 * Copyright (C) 2013 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.jbmsuppliers.bluetooth.le;

import android.annotation.SuppressLint;
import android.app.Service;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothGatt;
import android.bluetooth.BluetoothGattCallback;
import android.bluetooth.BluetoothGattCharacteristic;
import android.bluetooth.BluetoothGattDescriptor;
import android.bluetooth.BluetoothGattService;
import android.bluetooth.BluetoothManager;
import android.bluetooth.BluetoothProfile;
import android.content.Context;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.util.Log;

import java.util.List;
import java.util.UUID;

/**
 * Service for managing connection and data communication with a GATT server hosted on a
 * given Bluetooth LE device.
 */
@SuppressLint("NewApi")
public class BluetoothLeService extends Service {
    private final static String TAG = "zzyLog";//BluetoothLeService.class.getSimpleName();

    private BluetoothManager mBluetoothManager;
    private BluetoothAdapter mBluetoothAdapter;
    private String mBluetoothDeviceAddress;
    private BluetoothGatt mBluetoothGatt;
    private int mConnectionState = STATE_DISCONNECTED;

    private static final int STATE_DISCONNECTED = 0;
    private static final int STATE_CONNECTING = 1;
    private static final int STATE_CONNECTED = 2;

    public final static String ACTION_GATT_CONNECT_TIMEOUT           = "com.example.bluetooth.le.ACTION_GATT_CONNECT_TIMEOUT";
    public final static String ACTION_GATT_CONNECTED           = "com.example.bluetooth.le.ACTION_GATT_CONNECTED";
    public final static String ACTION_GATT_DISCONNECTED        = "com.example.bluetooth.le.ACTION_GATT_DISCONNECTED";
    public final static String ACTION_GATT_SERVICES_DISCOVERED = "com.example.bluetooth.le.ACTION_GATT_SERVICES_DISCOVERED";
    public final static String ACTION_DATA_AVAILABLE           = "com.example.bluetooth.le.ACTION_DATA_AVAILABLE";
    public final static String EXTRA_DATA                      = "com.example.bluetooth.le.EXTRA_DATA";

    public final static UUID UUID_HEART_RATE_MEASUREMENT       = UUID.fromString(SampleGattAttributes.HEART_RATE_MEASUREMENT);

    // Implements callback methods for GATT events that the app cares about.  For example,
    // connection change and services discovered.
    private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {
        @Override
        public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
            String intentAction;
            if (newState == BluetoothProfile.STATE_CONNECTED) {
                runtime=0;
                intentAction = ACTION_GATT_CONNECTED;
                mConnectionState = STATE_CONNECTED;
//                broadcastUpdate(intentAction);
                Log.v(TAG, "Connected to GATT server.");
                // Attempts to discover services after successful connection.
                Log.v(TAG, "Attempting to start service discovery:" +
                        mBluetoothGatt.discoverServices());


            } else if (newState == BluetoothProfile.STATE_DISCONNECTED) {

                runtime=99;
                intentAction = ACTION_GATT_DISCONNECTED;
                mConnectionState = STATE_DISCONNECTED;
                Log.i(TAG, "Disconnected from GATT server.");
            }
        }

        @Override
        public void onServicesDiscovered(BluetoothGatt gatt, int status) {
            if (status == BluetoothGatt.GATT_SUCCESS) {
                List<BluetoothGattService> gattServices=mBluetoothGatt.getServices();
                if (gattServices != null)
                {
                    for (BluetoothGattService gattService : gattServices)
                    {
                        runtime=0;
                        String uuid = gattService.getUuid().toString();
                        if(uuid.indexOf("000018")!=0)
                        {
                            List<BluetoothGattCharacteristic> gattCharacteristics =gattService.getCharacteristics();
                            for (BluetoothGattCharacteristic gattCharacteristic : gattCharacteristics) {

                                final int charaProp = gattCharacteristic.getProperties();
                                //if ((charaProp | BluetoothGattCharacteristic.PERMISSION_WRITE)>0)
                                {
                                    gattCharacteristic.setValue(0,
                                            BluetoothGattCharacteristic.FORMAT_UINT8, 0);
                                    if(bSetkeys)
                                    {
                                        gattCharacteristic.setValue(mCmd);
                                    }
                                    else
                                    {
                                        gattCharacteristic.setValue("@04000000001603*");
                                    }
                                    writeCharacteristic(gattCharacteristic);
                                }
                                //if ((charaProp == BluetoothGattCharacteristic.PROPERTY_NOTIFY))
                                {
                                    setCharacteristicNotification(gattCharacteristic, true);

                                }
                            }
                        }
                    }
                }

            }

            broadcastUpdate(ACTION_GATT_SERVICES_DISCOVERED);
            //System.exit(0);
        }

        @Override
        public void onCharacteristicRead(BluetoothGatt gatt,
                                         BluetoothGattCharacteristic characteristic,
                                         int status) {
            if (status == BluetoothGatt.GATT_SUCCESS) {
                broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);


            }
        }

        @Override
        public void onCharacteristicChanged(BluetoothGatt gatt,
                                            BluetoothGattCharacteristic characteristic) {

            broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);



        }
    };
    private String date;
    private int egk_id;
    private int ega_id;
    private int log_id;
    private int open_count;

    private void broadcastUpdate(final String action) {
        final Intent intent = new Intent(action);
        sendBroadcast(intent);

//        new MyLogin_Activity().Sound(BluetoothLeService.this,R.raw.dingdong,1);
    }
    String reqCMD="";
    boolean boo=false;
    private void broadcastUpdate(final String action,
                                 final BluetoothGattCharacteristic characteristic) {
        final Intent intent = new Intent(action);
        this.runtime=0;

        // This is special handling for the Heart Rate Measurement profile.  Data parsing is
        // carried out as per profile specifications:
        // http://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.heart_rate_measurement.xml
        if (UUID_HEART_RATE_MEASUREMENT.equals(characteristic.getUuid())) {
            int flag = characteristic.getProperties();
            int format = -1;
            if ((flag & 0x01) != 0) {
                format = BluetoothGattCharacteristic.FORMAT_UINT16;
                Log.d(TAG, "Heart rate format UINT16.");

            } else {
                format = BluetoothGattCharacteristic.FORMAT_UINT8;
                Log.d(TAG, "Heart rate format UINT8.");

            }
            final int heartRate = characteristic.getIntValue(format, 1);
            Log.d(TAG, String.format("Received heart rate: %d", heartRate));
            intent.putExtra(EXTRA_DATA, String.valueOf(heartRate));

        } else {
            // For all other profiles, writes the data formatted in HEX.
            final byte[] data = characteristic.getValue();
            if (data != null && data.length > 0) {
                reqCMD+=new String(data);

                if(reqCMD.indexOf("*")>0)
                {
                    intent.putExtra(EXTRA_DATA, reqCMD);
                    sendBroadcast(intent);

                    if(reqCMD.indexOf("@03")>=0 || reqCMD.indexOf("@ER")>=0)
                    {

                        bSetkeys=false;
                        Log.i(TAG, "回复退出." + intent.getStringExtra(EXTRA_DATA));
                        this.disconnect();
                        this.close();
                        System.exit(0);

                    }
                    else if(reqCMD.indexOf("@04")>=0)
                    {
                        String TID=mCmd.substring(3,11);
                        String KEY=reqCMD.substring(5,9);
                        int sKey=Integer.parseInt(KEY,16);
                        int sNum=sKey % 16;
                        sKey=((sKey << sNum) | (sKey >> (16 - sNum)));
                        byte[] KEYS=new byte[2];
                        KEYS[0]=(byte)(sKey / 256);
                        KEYS[1]=(byte) (sKey % 256);
                        byte[] TIDS=new byte[4];
                        TIDS[0]=(byte) Integer.parseInt(TID.substring(0,2),16);
                        TIDS[1]=(byte) Integer.parseInt(TID.substring(2,4),16);
                        TIDS[2]=(byte) Integer.parseInt(TID.substring(4,6),16);
                        TIDS[3]=(byte) Integer.parseInt(TID.substring(6,8),16);

                        for(int i=0;i<4;i++)
                        {
                            TIDS[i]=(byte) (TIDS[i]^KEYS[i%2]);

                        }
                        mCmd=mCmd.replace(TID,String.format("%02X",TIDS[0])+String.format("%02X",TIDS[1])+String.format("%02X",TIDS[2])+String.format("%02X",TIDS[3]));
                        mCmd=mCmd.substring(0, mCmd.length()-3)+checkCRC(mCmd.substring(1,mCmd.length()-3))+"*";
                        //intent.putExtra(EXTRA_DATA,mCmd);
                        //sendBroadcast(intent);
                        bSetkeys=true;
                        mBluetoothGatt.discoverServices();



                    }

                    reqCMD="";

                }


            }
        }

    }

    public  String checkCRC(String inStr)
    {
        try{
            byte[] buf =inStr.getBytes("GBK");
            byte bCheck = 0;
            for (int i = 0; i < buf.length; i++)
            {
                bCheck = (byte)((int)bCheck ^ (int)buf[i]);
            }
            return String.format("%02X", bCheck);
        }
        catch(Exception e){return "00";}
    }
    boolean bSetkeys=false;



    public class LocalBinder extends Binder {
        BluetoothLeService getService() {
            return BluetoothLeService.this;

        }

    }
    String mCmd="";
    String name ="";
     int id;
    boolean ifhex=false;
    int runtime=0;
    int timeout=10;
    @Override
    public IBinder onBind(Intent intent) {
        if(!initialize())
        {
            this.disconnect();
            this.close();
            System.exit(0);
        }
        if(!connect(intent.getStringExtra("address")))
        {
            this.disconnect();
            this.close();
            System.exit(0);
        }
        mCmd=intent.getStringExtra("cmd");
        name=intent.getStringExtra("name");
        open_count=intent.getIntExtra("open_count",0);
        log_id=intent.getIntExtra("log_id",0);
        egk_id=intent.getIntExtra("egk_id",0);
        ega_id=intent.getIntExtra("ega_id",0);
        ifhex=intent.getBooleanExtra("ifhex",ifhex);
        timeout=intent.getIntExtra("timeout",timeout);
        Log.v("main","25");

        new Thread(new Runnable(){
            public void run() {

                while(true)
                {
                    try{
                        Thread.sleep(1000);
//                        runtime++;


                        if(runtime >timeout)
                        {
                            runtime=0;

                            broadcastUpdate(ACTION_GATT_CONNECT_TIMEOUT);
                            {
                                disconnect();
                                close();
                                System.exit(0);
                            }
                        }


                    }catch(Exception ee){
                        ee.printStackTrace();
                    }
                }
            }
        }).start();


        return mBinder;
    }

    @Override
    public boolean onUnbind(Intent intent) {

        disconnect();
        close();
        return super.onUnbind(intent);
    }

    private final IBinder mBinder = new LocalBinder();

    /**
     * Initializes a reference to the local Bluetooth adapter.
     *
     * @return Return true if the initialization is successful.
     */
    public boolean initialize() {
        // For API level 18 and above, get a reference to BluetoothAdapter through
        // BluetoothManager.
        if (mBluetoothManager == null) {
            mBluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
            if (mBluetoothManager == null) {
                Log.e(TAG, "Unable to initialize BluetoothManager.");
                return false;
            }
        }

        mBluetoothAdapter = mBluetoothManager.getAdapter();
        if (mBluetoothAdapter == null) {
            Log.e(TAG, "Unable to obtain a BluetoothAdapter.");
            return false;
        }

        return true;
    }

    /**
     * Connects to the GATT server hosted on the Bluetooth LE device.
     *
     * @param address The device address of the destination device.
     *
     * @return Return true if the connection is initiated successfully. The connection result
     *         is reported asynchronously through the
     *         {@code BluetoothGattCallback#onConnectionStateChange(android.bluetooth.BluetoothGatt, int, int)}
     *         callback.
     */
    public boolean connect(final String address) {
        if (mBluetoothAdapter == null || address == null) {
            Log.w(TAG, "BluetoothAdapter not initialized or unspecified address.");
            return false;
        }

        // Previously connected device.  Try to reconnect.
        if (mBluetoothDeviceAddress != null && address.equals(mBluetoothDeviceAddress)
                && mBluetoothGatt != null) {
            Log.d(TAG, "Trying to use an existing mBluetoothGatt for connection.");
            if (mBluetoothGatt.connect()) {
                mConnectionState = STATE_CONNECTING;
                return true;
            } else {
                return false;
            }
        }

        final BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
        if (device == null) {
            Log.w(TAG, "Device not found.  Unable to connect.");
            return false;
        }
        // We want to directly connect to the device, so we are setting the autoConnect
        // parameter to false.
        mBluetoothGatt = device.connectGatt(this, false, mGattCallback);

        Log.d(TAG, "Trying to create a new connection.");
        mBluetoothDeviceAddress = address;
        mConnectionState = STATE_CONNECTING;
        return true;
    }

    /**
     * Disconnects an existing connection or cancel a pending connection. The disconnection result
     * is reported asynchronously through the
     * {@code BluetoothGattCallback#onConnectionStateChange(android.bluetooth.BluetoothGatt, int, int)}
     * callback.
     */
    public void disconnect() {
        if (mBluetoothAdapter == null || mBluetoothGatt == null) {
            Log.w(TAG, "BluetoothAdapter not initialized");
            return;
        }
        mBluetoothGatt.disconnect();
    }

    /**
     * After using a given BLE device, the app must call this method to ensure resources are
     * released properly.
     */
    public void close() {
        if (mBluetoothGatt == null) {
            return;
        }
        mBluetoothGatt.close();
        mBluetoothGatt = null;
    }

    /**
     * Request a read on a given {@code BluetoothGattCharacteristic}. The read result is reported
     * asynchronously through the {@code BluetoothGattCallback#onCharacteristicRead(android.bluetooth.BluetoothGatt, android.bluetooth.BluetoothGattCharacteristic, int)}
     * callback.
     *
     * @param characteristic The characteristic to read from.
     */
    public void readCharacteristic(BluetoothGattCharacteristic characteristic) {
        if (mBluetoothAdapter == null || mBluetoothGatt == null) {
            Log.w(TAG, "BluetoothAdapter not initialized");
            return;
        }
        mBluetoothGatt.readCharacteristic(characteristic);
    }
    public void writeCharacteristic(BluetoothGattCharacteristic characteristic) {
        if (mBluetoothAdapter == null || mBluetoothGatt == null) {
            Log.w(TAG, "BluetoothAdapter not initialized");
            return;
        }
        mBluetoothGatt.writeCharacteristic(characteristic);
    }
    /**
     * Enables or disables notification on a give characteristic.
     *
     * @param characteristic Characteristic to act on.
     * @param enabled If true, enable notification.  False otherwise.
     */
    public void setCharacteristicNotification(BluetoothGattCharacteristic characteristic,
                                              boolean enabled) {
        if (mBluetoothAdapter == null || mBluetoothGatt == null) {
            Log.w(TAG, "BluetoothAdapter not initialized");
            return;
        }
        mBluetoothGatt.setCharacteristicNotification(characteristic, enabled);

        // This is specific to Heart Rate Measurement.
        if (UUID_HEART_RATE_MEASUREMENT.equals(characteristic.getUuid())) {
            BluetoothGattDescriptor descriptor = characteristic.getDescriptor(
                    UUID.fromString(SampleGattAttributes.CLIENT_CHARACTERISTIC_CONFIG));
            descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
            mBluetoothGatt.writeDescriptor(descriptor);
        }
    }


}
